Reversing apparatus for heating furnaces



1,521,298 G. H. ISLEY REVERSING APPARATUS FOR HEATING FURNACES Filed Julyza, 1922 3 sheets-sheet 1 Lal-G y l I I @7 fici .In W@ llwzrenof: Gocyejf-Ife Y am Dec, 30, 1924.

L 4W I Q www@ G. H. ISLEY REVERSING APPARATUS FOR HEATING FURNACES Dec, 30, 1924.

Fiied July 28, 1922 I5 Sheets-Sheet 2 l'TLU RTO 7*' f Gew Bec, 30, 1,298

l G. H. ISLEY Y REVERSING APPARATUS FOR HEATING FURNACES Filed July 28, 1922 3 Sheets-Sheet 3 Patented Dec. 30, 1924-.

RVERSING APPARATUS FOR HEATING- FURNACES.

Application led July 28, 1922. Serial'No. 578,221.

To all whom it may concern 'Be' it known that I, GEORGE H. IsLiiY,

Ia citizen of the'. United States, residing at vWorcester, in the county of Worcester and Commonwealth of Massachusetta have invented a. new and useful Improvement in a Reversing Apparatus for Heating Furnaces, vof which the following, together with the accompanying drawings, is a specification.

The present invention relates to improvements in the apparatus which is used with the regenerative typerof furnaces, for reversing Vthe course through such a furnace of the burning gaseous fuel.

The present invention embodies the adaptation of certain principles'of operation which characterize the reversing apparatus forming the subject matter of my United States Letters Patent No. 1,408,946, issued March 7, 1922. The present invention contemplates tlie introduction of novel and improved features in apparatus of this class, 4whereby to render the same adaptable to heating furnaces, soaking pits and the like, including open hearth furnaces and other types, to which the air for supporting combustion of the fuel is admitted under pres- I sure,-instead of being drawn in from the atmosphere. Other and further improvements, in connection with the operating devices for such reversing apparatus, will be apparent as the description proceeds, reference being had to the accompanyingdrawings, wherein with air under pressure.

"Figa 2 is atop plan view of one of the units of the reversing apparatus.

Fig. 3 is a vertical sectional view 'along the line 3, 3 of-Fig. 2, and

Fig. 4 is an enlarged view in side elevation, partially in section, of a hydraulic op- Fig. 1 is a diagrammatic view illi'istrat'4 ing the application of my invention to aV vsaid openings.' regenerative furnace adapted to operate erating device for one of the reversing units.V

Figs, 2, 3

Referring to Fig. l, the furnace is indicated diagrammatically at 1, the same being' provided at opposite ends with the usual gas regenerator passages 2 and 2 and the usual air regenerator passages 3 and 3. Each gas regenerator 2, 2 is in communication with an underground flue 4 and said iiues 4, 4 have their terminals 5, 5 at opposite ends of the furnace, adjacent to similar terminals 6, 6 of gas supply flues 7, 7.

In the same way each air regenerator passage 3 and 3 is in communication with an underground flue 8 and these flues 8 have terminals 9, 9 at the ground level which are adjacent to the terminals 10, 10 of air supply iiues 1l, 11, the latter being connected to any suitable source of air under pressure, not shown.

In alineinent with each pair of lue terp minals 5, 6, is the terminal 12 of an under- Yground :flue 13 and these two lues 13, 13

merge intona common stack flue 14, as shown in Fig. 1. Each flue 13 upwardly directed branch whose terminal 15 is in lineV with the terminals 9 and 10 and thus at each end of the furnace there is `a group of six flue terminals, each group eing composed of two .rows of three terminals each, namely, 5, 6, 12 and 9, 10, 15.

Each group of the six flue terminals is surmounted by a water seal pan or base 16, the latter providing suitable flanged openings in registry with said terminals, and maintaininga supply of water, for sealing purposes, in surrounding relation to all of p In cooperation with each group of sin'r terminals is provideda reversing unit for each end of the furnace; these reversing units are identical in construction and a description of one will suffice for both. Each unit comprises a pair of shiftable hoods 17, 18, the former cooperating with'the flue terminals 5, 6 and 12 and the latter cooperating with the flue terminals 9, 10 and 15. The hoods 17, 18 of each unit are connected to move in unison by means of cross'fbars 19 19 which engage with lugs or ears 20,20, secured to opposite ends of said hoods. The cross bars 19, 19 are themselves supported, between the hoods,l by pivoted links 2l, 21 as shown in and 4, said links 2l being dishas an intermediate seelrespectively the.

,links lto hztve a ili'o position shown-in posed for swinging movement With -respect to their pivots or trunnions 22, 2 2 on a, pair of ste-tipnztry opposed hydraulic cylinders 23, 23".A The letter preferably occupy the space in the Vw21-ter pan or casing 16 which separates the rovvoli terminals 5, .6, 12 from the row. ol" terminals 9, 10 ztnd'15'. v

A double acting plunger rod 24 Works in the tvvo opposed cylinders 23, intermediate said cylinders, this plunger `rod has secured thereto 'a cross heed 2 5 having a piv: otecl connect-ion 26 with Vone of the sets of links. 2l:- When wolof is oolmoiod, to. tho

risli lsnsiorliridor 23, Eig- 4, by vor of o.

flfi nino 2T, ills pluossriod 2s is. driven to tlie. l`e f t a.nd by its boveA described con: nection With the supporting: links 21 of the hooglsl?, and 1 8, the latter are shifted, inthe seine. direction, being. constrained by thepnrallel motion of transf tholll `upwardly from Figs. 2 3, and then other position Whore ifi-'tion u hfioli carries.

dmvimorflly riio ihoii 'they cover,

12. and 9, 1 5. respectively. StartingE from when, iWitter-isi ad.- .Hiittefd to the left hand cylinder. 2 3., Fig. .11,v by wsyof. supply. Dino 2 7', this motion is hoods 1( and# 18. returning'to the positions illustrated in Figs, 211ml. 3, ivlioto., ss shown, ihoy-ioovos, oollilooi Vsind termini-isis, s andtheterminels, 10,' respectively.

" which.,

""liiis sealingoi th.) two terminals by). mii-ons of. offiioio-oding ski-ri ors-pson 2.8,'

f llistsorresnoiiii, to bho osljoooot termini-1s; .zur-f' biting-2 1.- iroiisvorse-irimnion o-whioliiinds,

flow of. tir-under pressure from flue 11 into` ilus. 8in iii-sv. of,

ilislotiodipping-into 16. find ooioiolil-"-; surroundingtlioiisilsss,

Essl! feos, siiioiily flange 28., by contgtot with said` lug teririiiisl 6, sool ons supply'. trmino-1,110, is equipped, with o, elf-ivf ity, swinging olosiif-s 29,. ills lst-tof' inl suitgible, slotsl proyded, a-

fbixxgclret or. een 31y of he base oesingvl.

Es-Loli. olosoro'oflios nizoiooiios loe-32, los eooperigition Withthe skirt on fion s 2 8. ofthe snpenposedfhool .17 or- 18, en Position oi iheiioffisshown-in. vFs- 3 solo 32,. holds tli'ejfiosuio '29 in oaissd position this-ps1:- mits Ythe, oxv. of ,gf-1s` froml line. 7 into flue,V 1- 'by' 'voyof hood 17, sod.- ino liko nimmer the llhe,v reversing unit nt the lefthgrnd. side of- F -1 oeeupie'stheposition 'above described, ihelieodf 1T( snowing tho terminals 5,6, os-

sho-W-iigiii Fig, 3,

"ill-sii' 1oiiis Position off ills. nests, tho tsr-f' minals'12 and 15 the left'hand side of position, namely,

'connect seni the. terminals 5,

tliewetei: of the pan cures.

in the.

y i I and thehood 1 8. being simi-. hir-1y,disposed.;A relativo to thoterminals, 9., lQ-,thuscausingthe ges ,endair'underr presm3-f 1li-isi@ bewies;

four stack termi-11.315', Iinfo, ineach, mw, l ,me

thefurnace are shut Voifend sealed by ineens toL the respective hoods 1 7 :,1nd`18.`

At. the right hand Sidi-.ofthe fmncenig.

-1, the other reversing unit constituted bythe tWo. hoods 17 V18`is-fshownfin theopposte l Withlthe-.hoodli 17' spttnning the flue terminals 5,112 Lund thehood 18 opooiiiig tho flo terminals 9,15- As oooosequ'ence ofy this, the gravity closing covers 29 ozt'the righlllalldterminals (51e-nd 10 are Y released, and thereby seal the said terminals against the passege' of gas. and al1?- under. pressure from the- -flues 7i and 11,.-respec-- tively. 'The productsof combustion 'from ilioiiir-.nzico .issuing si tho .right lio-.nd sitio;

thereofY tlirgnigliy theregeneretorl passages 2f l and 3 are conveyed bythefluesfl and- 8- to`l the. terminals 5.- and-9,p z 1s sing by Way. of hoods-17 and. l8- oof and thence. into. the right hand fluev 13Y lendf ing` tothe stash passage 14,.

The reiversnlA of th furnace iseffiectel 'by i Cassinetho ditootions- When. tho' hoods 1.7. and 218 oithe right hand unit tre. swung o veigtoiun-sr cover the terminals- 12. and llnd to coverV twoj units tomove inoppositeillsioirriiiwls 6.-. anni 1Qilisollovvinesstion is. obse'rvoslreftliooovoiso Whioli-proviousff ly occupied. the.`dottedline-'position shown io Fisonflaooiint of their. Asttooli: mont to, ooifls 3.5., swing .clown by ,gravit-y,v

in tosealingposit'ion oifoifthe figlio hond;

12`v find- 1 5- At bhs-somoi-ime. tho.-

'act of spioolligg the terminals'. 6 and 10- lonthisright handset (if-'hoods- '17., L18, 'pro.

'the elevation. of the olosiir-os. 2.5i, 29,VVV

tliussstslolislii.iigthe flowyofess. and, sin

uliflon- Piiosslire., into, vthe regenerzttor,` pes?. sog-:ss fur-nooo, the 11o-verso movement of ibs-hoods.

17i fwd- '118 Pr-osurss. iliegoovityshut. ofi, by

ensures. 2o, 2o., of tbs terminals. s and lo,...

and, at theserne time. removes, the covers '33,

assuming the tipped-up positi0n-gshown in,

Fie'- 3, bv, cords 3 5.

Combustion morimos-isomilio Hoessein-iol*- passages 2 and 3 by Way of, -luesflfend' 1- ridrsssonoftlisifoattachment to the This.. action permits-'tho 1 flow of hoods 1 7 and 18. intotlie right'hand-lue 13 and thence to. thestotolr` passa-ge 114:.

In ,tnOtl1er form- 0f 'the invention, illus# `cli'xzirlui-lflue temiinalSB, 36, and 37, the i same fornuingrigprrr-tofv two aflinedf rotvsof- 172-, sixl flue terminals. eaicmnemelyygas supplyV terminals 385,38;eirsupply-terminels 39,391 'Y andr stool@ fluo tor-iii.iiifilsA 4.0,. 40,.-o1ifl 4.1.-',

By megtns `o fsuitable underground flues, the

connected to a. common stack passe-ge 42.

the-terminals, 12 S i' The terminals 38 and 394 of each row are as- ',fsociated respectively witha gas supply flue 43 vand with a supply lflue 44 conveying air under pressure from any suitable means, not shown. p

Each group orrow of six flue terminals Y' "is surmounted by an elongated water-seal fall of said openings. In cooperation with each group of six terminals, is provided a reversing unit for each end of the furnace; thesereversi'ng units are identical in construction and a description ofone will suffice Vfor both. Each unit comprises a pair of longitudinal alined shiftable hoods 46, 47, the former cooperating with the flue terminals 41, 37, 39, and the latter cooperating with the flue terminals 40, 36, 38. The hoods 46, 47, of each unit are connected to move in unison by means of a .framework 48 rigidly secured to the sides of said hoods, and maintaining them in spaced relation so as always to leave between them a single flue terminal (either the terminal 39 or the terminal 40) which is covered and sealed by a plate 49.

The framework 48, carrying the hoods 46, 47, and the connecting plate 49, is capable of a parallel motion of translation by reason of its pivotal attachment at 50, 50, to swinging parallel links 51, 51, projecting upwardly from the base 45. The specific means employed to effect this movement is wholly independent of the presentinvention; any suitable actuating devices may be utilized, such for instance as disclosed in my copending application, Serial No. 268,391, filed Dec. 26, 1918. It is sufficient to note that each gas supply terminal 38 in the present arrangement is equipped with a gravity acting swinging closure 51, having a projecting lug 52 for cooperation with the sealing skirt or ange 53 of the hood V47, and that each hood 46 has pivoted thereto a cover 54 adapted in one position of the reversing unit to shut off and seal the stack flue terminal 41.

As indicated in F ig. 6, wherein the right hand reversing unit occupies the position shown in Fig. 5, the direction of gaseous products through the furnace is from right to left, the gas entering the regenerator 2 by way of hood 47 of the right hand unit, and the air under pressure entering the regenerator 3 by way'of hood 46 of the right hand unit; the two stack terminals 40 and 41 of the right hand group are shown as blanked off, the former by the plate 49, and the latter by the cover 54. At the left-hand end of the furnace, as shown in Fig. 6, the reversing unit occupies its other position, having been shifted to expose the gas supply pairs of uninclosed hoods terminal 38, which latter remains sealed off by its gravity closure 51. At this end of the furnace the burned products of combustion issuing from regenerator 2 pass into stack terminal 40 by way of hood 47, and the burned products of combustion issuing through regenerator 3 pass into stack terminal 41 by way of hood 46; the cover 54 of this unit is inoperative, and the aii supply terminal 39 is blanked off by the connecting plate 49.

The reversal of the furnace is effected by causing both units to move to the left, Fig. 6. This, as will be well understood, disposcs the left hand unit in the same relative position to its group of terminals as shown in Fig. 5, thus connectingV the regenerators 2 and 3` with the sources respectively of gas and air under pressure; at the right hand side the sources of gas and air under pressure are blanked ofl', and the regenerators 2 and 3 are connected to stack.. It is to be noted, in both forms of the invention, that the closures 29 and 51 associated with flue terminals 6, 10 and 38, and controlling the passage of ingoing comparatively cool gases to the furnace, can open within the hoods 17, 18 and 47 without danger of being overheated by the gases passing through said hoods. On the other hand, the covers 33 and 54, associated with terminals 12, 15 and 41, are so arranged as not to be enclosed by the hoods at any time, since said covers are subject, when in a lowered position, to the intense heat of the burned gases, and hence, at other times must be left exposed to the cooling action of the atmosphere.

I claim,

1. The combination with a regenerative furnace wherein combustion is supported by air under pressure, of reversing apparatus for said furnace constituted by duplicate at each end.

2. The combination with a regenerative furnace wherein combustion is supported by air under pressure, of reversing apparatus for said furnace constituted by duplicate pairs of uninclosed hoods, viding for the inflow of air under pressure and gas and for the outflow of combustion products.

3. The combination with a regenerative furnace havlng for each end a supply of air under pressure, and a supply of gas, of reversing means for said furnace constituted by duplicate pairs of uninclosed hoods, each pair adapted to control the flow to said furnace of gas and of air under pressure.

each pair pro- 4. The combination with a regenerative 5. The cel'nlination with aregenerative 'lurnuce having foreach end aV supply of an' under"pressurejfandl supply yof gas, oi eo` operating; duplicate revers'ng devices, one

for each end of the 'urnaee, and each oon-Y sisting Vof YaV -pair of unin'elosed lioods,\sde by side; with a common: interposed actua-ting-means:

6E Theeoinloinatorr with al regenerative furnace having; for eaolr end supply of an" under pressure, "and a supply of gasg'o ooyoperating; duplicate reversing devieesfone for eachf endof the furnace, andI eaolr oon' sisting oi' a= pair'ofuninclosed--hoodsside by" side; and movable unison; one serving for bhe inflow of air under pressure and the Y operating. duplicate reversing devices', one" other serv-ingforalieinfleweliges..V

- 7. The eoinblnailon. with a regenerative VJEurxracer1 having for eaolrendla supply Vof air under pressure,. and' a supply of'gas, ofco'- foreach end of thefurn-aoe, and each oonfurnace, of reversing means tlre'reif'forgnon;

sis'ing of duplicate movableJ devieesfat ea'el'r end,V eaol'i device providing off? unin# closed hoods', Yside b Wit-litlie' gas',n air,4 rege'ne'rator andi Sta-elfi: figues? offtlie furnace( f air under pressure,. and-lY` a supply' of gas;4 oi? cooperating" duplicate'- reve'rsing; p' dev-iees,. one;

sisting of pair o'funinclosed Floods Inov# able 1n un1son",. one-servingV for.' the: miowv. of.V

fon the inflow l ofy gas: Y

' Geenen air undery pressue the other servingi sidefoneooperatiion;

,Y l `35 V9. Tire oombfrfation Witl al regenerative furnaceliamng foreach? en'd 'supplyko 

